I know I can get $27 on google with an adwords campaign and my well done landing page.
Will that preclude me from staying on KDP at $8.97 ?
Will advertising on another platform at a higher price for the same book create issues ?
Do I take it off KDP altogether to go to Google ( or Yahoo) ?
Thanks in advance.

If you go lower anywhere else, Amazon will drop your Amazon price to match, whether you want them to or not.

For example, you're $3 on Amazon and $2 somewhere else for a week. Amazon will probably find that lower price and match you to $2. When the week is up, you go back to $3 somewhere else but Amazon can stay stuck at $2 for a couple months. That's the gamble with price matching.

If you want to go higher or lower, change your price on amazon as well. You can advertise all you want. You just can't put it up for sale someplace else until the KDP contract is up. When my contract was up I got out of KDP and can do what I want, most of the publiehers will price match a lower price.

You can change your price on amazon right now, then when the 14th comes around you already got that done.